Anodizing or Powder Coating ?

Does anyone know which is better for aluminum panels?

I want the interior panels of my build black and there are arguments for both.
 

Randy V

Admin
Lifetime Supporter
Anodizing is permanent.
Powder coating should be permanent, but rarely is unless someone has been extremely meticulous in the cleaning and preparation of the panels.
If it is in the budget, I would anodize anything alloy...
 

Neil

Supporter
Some aluminum alloys anodize better than others so consider that. Why not do a good epoxy primer & polyurethane topcoat?
 

Neil

Supporter
Steve;

I used this on my aluminum panels.

https://www.aircraftspruce.com/catalog/cspages/ptiprimers.php?clickkey=97961

Chassis Primed & Partial Topcoat F.jpg
451 Rivets.jpg
You have a choice of yellow (actually greenish-yellow) or green zinc chromate.

First, scuff the surface with Scotchbrite and then treat the surface with a phosphoric acid solution, then rinse thoroughly and let dry. Apply the primer per instructions and you have a nice hard surface that is ready to top coat. I used an aerospace grade isocyanate polyurethane yellow over this primer on my steel tube chassis but I left the aluminum in primer because I liked the "aircraft" look.
 
Steve;

I used this on my aluminum panels.

https://www.aircraftspruce.com/catalog/cspages/ptiprimers.php?clickkey=97961

View attachment 94779View attachment 94780You have a choice of yellow (actually greenish-yellow) or green zinc chromate.

First, scuff the surface with Scotchbrite and then treat the surface with a phosphoric acid solution, then rinse thoroughly and let dry. Apply the primer per instructions and you have a nice hard surface that is ready to top coat. I used an aerospace grade isocyanate polyurethane yellow over this primer on my steel tube chassis but I left the aluminum in primer because I liked the "aircraft" look.
Did you brush it or spray it?

Which option did you choose, some have spray options.
 

Attachments

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Neil

Supporter
Steve;

My choice was the yellow zinc chromate in a quart size. I sprayed it on with a $9.99 on-sale spray gun from Harbor Freight. At that price you can throw it away instead of cleaning it. Buy the quart or gallon-size containers and spray it yourself. The small spray cans are OK for small jobs or touch-ups but not for larger panels. I'd suggest spraying all your panels at the same time.
 
Steve;

My choice was the yellow zinc chromate in a quart size. I sprayed it on with a $9.99 on-sale spray gun from Harbor Freight. At that price you can throw it away instead of cleaning it. Buy the quart or gallon-size containers and spray it yourself. The small spray cans are OK for small jobs or touch-ups but not for larger panels. I'd suggest spraying all your panels at the same time.
Great advice, thanks Neil
 
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